Deliberate mistake: When Bart is in the genius school, the teacher asks him if he knows what happens if he adds an acid to a base. He replies yes, adds them anyway and the lab explodes and a green goo comes out, turning Bart green. If you add an acid to a base, you just get salt and water.
The Simpsons (1989)
1 deliberate mistake in season 1 - chronological order
The Simpsons Christmas Special: Simpsons Roasting on an Open Fire - S1-E1
Continuity mistake: Lewis changes from black to yellow when Milhouse dares Bart to pull Santa's beard off. (00:14:10)
TV Announcer: The Continental Soccer Association is coming to Springfield. It's all here: fast kicking, low scoring. And ties? You bet.
Bart: Hey Dad, how come you've never taken us to see a soccer game?
Homer: I don't know.
TV Announcer: You'll see all your favorite soccer stars. Like Arriaga, Arriaga II, Barriaga, Aruglia, and Pizzozza.
Homer: Oh, I've never heard of those people.
TV Announcer: And they'll all be signing autographs.
Homer: Woohoo!
TV Announcer: This match will determine once and for all which nation is the greatest on Earth. Mexico or Portugal.
Trivia: The only voice artists who regularly perform as only one character are Yeardley Smith as Lisa and Marcia Wallace as Edna Krabappel. Yeardley has also voiced different versions of Lisa (Lisa Jr. and Lisabella) in at least two other episodes.
Question: Which episodes feature the "Howling Dog" (usually used on outside shots of buildings)?
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